- To strike with a hard blow.
- To affect in a specified way by striking hard: knocked the mugger senseless.
- To cause to collide: I knocked my head on a low beam.
- To produce by hitting or striking: knocked a hole in the wall.
- To instill with or as if with blows: We tried to knock some sense into his head.
- Slang To find fault with; criticize: Don't knock the food; it's free.
- To strike a sharp audible blow or series of blows, as on a door.
- To collide with something: knocked into the table.
- To make a pounding or clanking noise: The car engine is knocking.
- An instance of striking or colliding; a blow.
- The sound of a sharp tap on a hard surface; a rap.
- A pounding or clanking noise made by an engine, often as a result of faulty fuel combustion. Also called ping1.
- Slang A cutting, often petty criticism.
- around Informal To be rough or brutal with; maltreat.
- around Informal To wander from place to place: knocking around Europe.
- around Informal To discuss or consider: met to knock around some ideas.
- knock back Informal To gulp (an alcoholic drink).
- knock down To bring to the ground with a blow; topple.
- knock down To disassemble into parts, as for storage or shipping.
- knock down To declare sold at an auction, as by striking a blow with a gavel.
- knock down Informal To reduce, as in price: knocked each radio down 20 percent.
- knock down Slang To receive as wages; earn: knocks down $50 an hour.
- knock off To take a break or rest from; stop: knocked off work at noon.
- knock off To cease work: It's after five; let's knock off.
- knock off Informal To complete, accomplish, or dispose of hastily or easily; finish: That author knocks off a book a year.
- knock off Informal To get rid of; eliminate: knocked off 12 pounds in a month.
- knock off Slang To kill or overcome.
- knock off Slang To hold up or rob: knocked off a bank.
- knock off Informal To copy or imitate, especially without permission: knocking off someone else's ideas.
- knock out To render unconscious.
- knock out Sports To defeat (a boxing opponent) by a knockout.
- knock out To render useless or inoperative: The storm knocked out the phones.
- knock out Informal To exert or exhaust (oneself or another) to the utmost: knocked herself out to be ready on time.
- knock out Informal To produce in abundance: The workers knocked out 500 parts in one hour.
- knock out To inactivate or remove (a gene) by genetic engineering.
- knock together To make or assemble quickly or carelessly.
- knock up Slang To make pregnant.
- knock up Chiefly British To wake up or summon, as by knocking at the door.
- knock up Chiefly British To wear out; exhaust.
- have it knocked Slang To be certain of success: "He knew he had it knocked after he saw a rough cut of Chinatown” ( Time).
- knock cold To render unconscious; knock out.
- knock dead To kill with a blow.
- knock dead Slang To affect strongly and positively: a performance that knocked the audience dead.
- knock it off Slang Quit it. Often used in the imperative: Knock it off! I'm trying to sleep.
- knock (oneself) out To make a great effort; exhaust oneself.
- knock out of the box Baseball To force the removal of (an opposing pitcher) by heavy hitting.
- the Slang To overwhelm or amaze.
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